I don't find 4 weeks to be a "lot" of vacation time, but I think the hundred million workers or so who have 2 weeks or less every year would disagree that 4 weeks is "standard." On top of that I took 2 weeks of remote work.
That said, if you're an awesome engineer (especially mobile -- Trulia has about a dozen mobile apps to build out), and you want 10 weeks every year, lets talk. I don't hire for the mobile teams so I can't speak for them but I am certain that would at least love to talk to you.
But you've highlighted the problem I have with "unlimited" vacation. If I have to negotiate for 10 weeks, then I don't have unlimited, I have 4 weeks with possibly some extra but I don't know how much extra until i'm told off for taking it
No negotiation is required. The policy is 'we don't track vacation days' and that would be just as true for you looking for 10 weeks as it is for me who took 4. I'm not a benchmark-setter (or follower) I just happened to take 4 weeks so that's what I shared.
That said, you can't expect it to be considered in a vacuum. If you want to take 2.5 months of vacation, your work does need to be unimpeachably strong, and your dedication needs to be obvious to your teammates.
That said, if you're an awesome engineer (especially mobile -- Trulia has about a dozen mobile apps to build out), and you want 10 weeks every year, lets talk. I don't hire for the mobile teams so I can't speak for them but I am certain that would at least love to talk to you.